Rail mounted light source



FIG. 1 is a front, top, left side perspective view of our design.

FIG. 2 is a front, top, right side perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a left elevation view thereof.

FIG. 5 is a right elevation view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed lines in the figures are included for the purpose ofillustrating portions of the article and form no part of the claimeddesign.

CLAIM The ornamental design for a rail mounted light source, as shownand described.